Refactor tests in GIOS #283365

Job	Run time
Collect information & changes data	16s
Prepare pre-commit base	16s
Check Dockerfile.dev	16s
Check Dockerfile	15s
Prepare dependencies (3.14)	37s
Prepare dependencies (3.13)	29s
Check script/hassfest/docker/Dockerfile	16s
Check ruff	16s
Check ruff-format	13s
Check other linters	27s
Check all requirements	29s
Check hassfest	1m 7s
Check mypy	29s
Check pylint	29s
Check pylint on tests	25s
Dependency review	-1s
Audit licenses	0s
Run tests Python 3.13 (gios)	2m 58s
Run tests Python 3.14 (gios)	1m 18s
Run ${{ matrix.postgresql-group }} tests Python ${{ matrix.python-version }}	-1s
Split tests for full run	-1s
Run ${{ matrix.mariadb-group }} tests Python ${{ matrix.python-version }}	-1s
Run tests Python ${{ matrix.python-version }} (${{ matrix.group }})	-1s
Upload test coverage to Codecov (full suite)	0s
Upload test coverage to Codecov (partial suite)	17s
Upload test results to Codecov	-1s
	10m 47s

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